Semiautomatic gun.



PATENTED AUG. 22, 1905.

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APPLICATION FILED JUNE 20,1003.

PATBNTED AUG. 22, 1905.

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PATENTED AUG. 22, -1905.

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w H BEVANS SEMIAUTOMATIO GUN. APPLICATION FILED JUNE 20, 1903.

UNITED STATES PATENT OFFICE.

WILLIAM H. BEVANS, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO AMERICAN &BRITISH MANUFACTURING COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEWYORK.

SEIVIIAUTOMATIC GUN.

Specification of Letters Patent.

Patented Aug. 22, 1905.

To all whmn it may concern:

Be it known that I, WILLIAM H. BEVANs, a citizen of the United States,residing at Bridgeport, in the county of Fairfield and State ofConnecticut, have invented certain new and useful Improvements inSemiautomatic Guns, of which the following is a specification.

This invention relates to improvements in semiautomatic guns; and theobject is to provide an improved semiautomatic device to be eitherconstructed with or attached to rapidfire guns and to so construct andarrange the same that it will operate with a minimum amount of recoil ofthe gun.

With the above object in View the invention consists in the novelfeatures of construction hereinafter fully described, particular] ypointed out in the claims, and'clearly illustrated by theaccompanyingdrawings, in which Figure 1 is a side elevation of thebreech portion of a gun with my invention applied thereto;-Fig. 2, asimilarview showing the positions of the several parts of the inventionwhen the gun has reached the limit of recoil; Fig. 3, a top plan View ofthe invention; Fig. A, an end elevation, and Fig. 5 a detail view of thelever to which the two oppositely-acting thrust-bars are pivoted.

The present invention is designed as an improvement upon the structureshown in my Patent No. 673,594, of May 7, 1901, in which structure it isnecessary for the gun to have a considerable amount of recoil in orderto render the device operative.

My present invention is so constructed as to utilize a very small amountof recoil in performing its functions.

Referring now more particularly to said drawings, 1 designates arecoiling gun, (the one here illustrated being the well-known Hotchkisstype,) and 2 a portion of the non-recoiling part of the recoil-mountupon which the gun recoils. Attached to the nonrecoiling part 2 orformed integral therewith if the attachment and gun are constructed atthe same time is a bracket 3, having a perforated lug 4, to which oneend of the closingspring 5 for the breech-block is attached, and adownwardly and rearwardly disposed arm or hanger 6, in which a lever 7is intermediately pivoted. For convenience in manufacturing andassembling, this lever, as shown in Fig. 5, is formed of twooppositely-disposed members locked together and the whole pivotallysecured in said hanger by a pin 8. Pivotally attached to the upper endof said lever is a thrust rod or bar 9, which is cut out at its rear endto form a shoulder 10 to engage and having a small headed stud 16projecting from its opposite end, is a second thrust-bar 17, slotted atits opposite' end to receive a stud 18, formed as a prolongation ofrockshaft 13 and headed to prevent disengagement of the bar therefrom.

A coiled spring 19 is attached at one end to the underside of thethrust-bar 9 and at its opposite end to a-link 20, which is insertedupon the stud 16, said link serving to attach the spring and also toprevent the pivotpin 15 from disengaging the thrust-bar 17 and lever 7.This spring holds the shoulder 21 of the thrust-bar 17 normally pressedagainst the stud l8 and also moves the engaging end of thrust-bar 9downward into operative position when the gun has moved rearward asufficient distance on recoil.

The breech-block 22 is here shown of the drop-block type and is actuatedto open and close the breech by the rocking of shaft 13 and in movingactuates the extractor, which is preferably of the form shown in myapplication filed June 4:, 1902, Serial No. 110,203,

.said extractor after extracting the empty case The block-actuatingthrust-bar is thus moved a suflicient distance forward for the shoulder10 thereof to drop in front of the roller 11, the bar being moveddownwardly at its engaging end by spring 19. The gun incounter-recoiling, by contact of the roller with the shoulder of bar 9,causes the shaft 13 to rock.

block is held in its open position by the extractor until a freshcartridge is inserted when it releases the block, permitting the spring5 to close it, said spring having been placed under tension by theopening of the block.

By providing the two oppositely acting thrust-bars the movementcommunicated to the mechanism by the recoil is greatly increased overthe length of recoil, so that the device may be adjusted to operate nomatter how small the recoil.

I do not limit the invention to the particular type of gun here shownand described, as with modification it may be used on guns havingdifferent forms of breech blocks and breech mechanisms; nor do Ilimitthe inven' tion to the exact details of structure here set forth, asmany changes and modifications may be made without departing from thespirit and scope of the invention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent of the United States, is-

1. The combination with a recoiling gun, a recoil-mount, and abreech-block, of a thrustbar carried by anon-recoiling part of the mountfor actuating the block, and means actuated upon the movement of the gunfor moving said thrust-bar forwardly on recoil of the gun and rearwardlyon counter-recoil thereof.

2. The combination with a recoiling gun, a recoil-mount, and abreech-block, of a thrustbar carried byanon-recoiling part of the mountfor actuating said block, and means actuated upon the movement of thegun for moving said bar to position to actuate the block on recoil ofthe gun and effecting a reverse movement of said bar to actuate theblock on counter-recoil of the gun.

3. The combination with a recoiling gun, a recoiln1ount, and abreech-block, of two oppositely-movable thrust-bars, one of which isarranged to actuate the block, and the other to be actuated upon themovement of the gun on recoil and counter-recoil and to communicatemovement to the block-actuating bar.

4. The combination with a recoiling gun, a recoil-mount, andabreech-block, of a reciprocating thrust-bar carried by a non-recoilingpart of the mount for actuating the block, a reciprocating thrust-barcarried by a non-recoiling part of the mount and actuated upon themovementof the gun on recoil and counterrecoil, and an operativeconnection between said bars arranged so that the movement of thelast-mentioned bar imparts a reverse movement to the block-actuatingbar.

5. The combination with a recoiling gun, a recoil-mount, and abreech-block, of a reciprocating thrust-bar carried by a non-recoilingpart of the mount for actuating the block, a reciprocating thrust-barcarried by a non-re coiling part of the mount and actuated uponthemovement of the gun on recoil and counterrecoil, and a rockingconnection between said bars whereby the movement of the last-mentionedbar imparts a reverse movement to the I block-actuating bar.

6. The combination with a recoiling gun, a recoilmount, and abreech-block, of an intermediately-pivoted lever carried by anon-recoiling part of the mount, a thrust-bar pivoted to one of the armsof said lever for actuating the block, and a thrust-bar pivoted to theother arm of said lever and adapted to be actuated in reverse directionsupon recoil and counter-recoil of the gun.

7. The combination with a recoiling gun, a recoil-mount, a breech-block,and a rock-shaft for actuating the block, of a thrust-bar carried by anon-recoiling part of the mount for actuating said shaft, and meansactuated upon the movement of the gun on recoil for moving said bar toposition to actuate the shaft and effecting a reverse movement of thebar upon counter-recoil of the gun.

8. The combination with a recoiling gun, a recoil-mount, a breech-block,and a rock-shaft for actuating the block having aneccentrically-arranged shoulder, a thrust-bar carried by a non-recoilingpart of the mount having an operating-shoulder, means for moving saidbar forwardly on recoil of the gun to interpose said shoulder in thepath of the eccentrically-arranged shoulder of the rock-shaftand formoving said bar rearwardly on counterrecoil of the gun to assist ineffecting the movement of said rock-shaft.

9. The combination with a recoiling gun, a recoil-mount, a breech-block,and a rock-shaft for actuating the block having an eccentric shoulder,of a thrust-bar carried by a nonrecoiling part of the mount having anoperatingshoulder, and a thrust-bar carried by a non-recoiling part ofthe mount having an operative connection with said first-mentionedthrustbar and adapted to be actuated upon movement of the gun on recoilto move said bar forwardly to interpose the shoulder thereof in the pathof the eccentrically arranged shoulder of the rock-shaft and uponmovement of the gun on counter-recoil to move said bar rearwardly toassist in effecting the movement of said rock-shaft.

10. The combination with a recoiling gun, a recoil-mount, and abreech-block, of means between said bars whereby the reciprocationof'one effects the reverse reciprocation of the other, and means forlimiting the forward movement of the block-actuating bar.

In testimony whereof I have signed my name to this specification in thepresence of two witnesses.

, WILLIAM H. BEVANS'.

Witnesses:

L. E. BRADSTREET, W. A. WHEELER.

